From One A-body to Another (Air Conditioning)!

I think the only difference in the firewall is the cut out for the Evap Tubes, you can use the seal from your donor car as a template to cut out the firewall if need be. I don't remember the rad supports being different between air and non air cars, just the radiator and the mandatory shroud if you run a/c.

Pretty sure the hole in the dashboard will accept the A/C control panel, you will have to do a little wire engineering too if non A/C car. Not that hard.

Swap in the 318 while you are at it so you can run the a/c while climbing a hill:)